jennifer griffin live at the pentagon tonight. jennifer, what happened? >> well, with little fanfare, shep, u.s. and nate officials in afghanistan removed from their web site the month-to-month figure saying attacks by the taliban were down by 7% last year. there seemed to be a mistake. a mistake that led to administration officials making statements like this. >> violence levels have been trending downward in the last two years after five years of steady increases beginning in 2006. >> the problem is the attacks weren't trending downward. they were exactly the same as in 2011. an embarrassing admission by the pentagon that the the narrative about how the president's strategy in afghanistan was bearing fruit may have been misleading, shep. >> shepard: they must be making some case at the pentagon in their own defense. >> well, in essence, they blame the afghans. the afghan commanders supposedly forgot to submit their field reports about the attacks so the pentagon data was misleading. >> this is a regrettable error in our database systems that was discove